As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MIA INFLIGHT T639/28MAY - RETURNED TO MIA DUE TO BOTH NOSE LANDING GEAR DOOR INDICATORS ILLUMINATED. LANDED WITHOUT INCIDENT. FOUND LEFT LANDING GEAR DOOR ACTUATOR ROD END JAM NUT LOOSE. RESECURED LANDING GEAR DOOR ACTUATOR ROD END JAM NUT. SYSTEM GROUND CHECKED NORMAL OPERATION.